As Computing Mark Scheme

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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
GCE Advanced Subsidiary Level and GCE Advanced Level

MARK SCHEME for the May/June 2009 question paper for the guidance of teachers

9691 COMPUTING
9691/01 Paper 1 (Written Paper 1), maximum raw mark 90

This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes must be read in conjunction with the question papers and the report on the examination.



CIE will not enter into discussions or correspondence in connection with these mark schemes.

CIE is publishing the mark schemes for the May/June 2009 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

Page 2 1 (a)

Mark Scheme: Teachers’ version GCE A/AS LEVEL – May/June 2009

Syllabus 9691

Paper 01

(i) To allow the user to give the computer data/change data into computer understandable form (ii) To allow the computer to give information/communicate with the computer/to change information from computer into human understandable form (iii) To keep data while the computer is not using it (1 per dotty) [3]

(b) -Black and white laser -e.g. Use in office to produce letters -Produces high quality/speedy so does not develop large queue on a LAN -Colour laser -e.g. To produce reports for a meeting -High quality outputs/can produce large quantity quickly -Dot Matrix - e.g. Print receipts at checkout/tickets on railway -Produces more than one copy at a time, one for customer + one for shop -Inkjet -e.g. Doing homework at home -Relatively cheap and slowness does not matter -Plotter -e.g. Produce architect’s plans -Precision drawing tool -Braille printer -Producing documents/books for blind people -Outputs physical/3D form of data (3 per type, max 3 types, max 9) 2 (a) (i) Name: Text/String/alpha/alphanumeric Description: Text/String/alpha/alphanumeric Cost: Currency/integer/real/float Whether: Boolean Number: Integer (1 for first three, 1 for last 2) (ii) Field Sizes: 10 50 4 1 1 66 – 50 – 250 – 8 – 4 – 313 bytes (1)

[9]

[2]

Total

(1) for showing that the field sizes should be added up Multiply Total by 1000 (1) = 66000 to 313000 bytes Add extra (10%) for overheads (1) = 72600 to 344300 bytes Convert to sensible unit (÷1024) (1) = 70.9Kb to 344.3Kb. (5 possible mark points, max 4)

[4]

© UCLES 2009

Page 3

Mark Scheme: Teachers’ version GCE A/AS LEVEL – May/June 2009

Syllabus 9691

Paper 01

(b) Advantage: -Processed/Searched more easily/quickly/Estimate of file size is easier -e.g. When a customer wants to know the availability of an item the record can be found quickly/makes selection of storage easier Disadvantage: -The size of fields must be determined before use so space is often wasted/not sufficient -e.g. The “description” field may not be large enough for a particular item. (1 per -, max 4) [4] 3 -Working from home -Fewer journeys/more free time/less supervision… -Different types of jobs/jobs lost/job opportunities arising -Production line/manual jobs being lost/replaced by more technical jobs -Work done can be more visible to managers -All work/times working can be seen/leading to rewards where appropriate/sanctions when poor effort -Safety of workers is improved -Computers/robots do dangerous tasks/can be used to accurately monitor dangerous processes -Work time can be less rigid -Work can be fitted in round other commitments/leads to simpler ways of job sharing -The 24 hour job/office/commitment/world workforce -Workers may always be contactable/throughout the world/communications. (Up to 2 per group, max 3 groups, max 6) [6] (a) Line X A OUTPUT CONDITION 1 1 3 1 1 4 1...
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